05000529/LER-2005-002, Re Tis 3.0.4 Violation; Mode Change Made with One of Two Required LPSI Pumps Inoperable

Re Tis 3.0.4 Violation; Mode Change Made with One of Two Required LPSI Pumps Inoperable

ML052240284
Person / Time
Site:	Palo Verde
Issue date:	08/03/2005
From:	Danni Smith Arizona Public Service Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
102-05316-DMS/CKS/DJS LER 05-002-00
Download: ML052240284 (7)

LER-2005-002, Re Tis 3.0.4 Violation; Mode Change Made with One of Two Required LPSI Pumps Inoperable

Event date:
Report date:
Reporting criterion:	10 CFR 50.73(a)(2)(i) 10 CFR 50.73(a)(2) 10 CFR 50.73(a)(2)(viii)(A) 10 CFR 50.73(a)(2)(viii)(B) 10 CFR 50.73(a)(2)(iii) 10 CFR 50.73(a)(2)(ix)(A) 10 CFR 50.73(a)(2)(v)(A), Loss of Safety Function - Shutdown the Reactor 10 CFR 50.73(a)(2)(x) 10 CFR 50.73(a)(2)(v), Loss of Safety Function
5292005002R00 - NRC Website

text

1 OCFR50.73 LAPS Palo Verde Nudear Generating Station A subsidiary of Pinnacie West Capital Corporation David M. Smith Plant Manager Nuclear Production Tel: 623-3934116 Fax, 623-393-6077 e-mail: DSMITH10@apsccom Mail Station 7602 PO Box 52034 Phoenix, Arizona 85072-2034 102-05316-DMS/CKS/DJS August 3, 2005 ATTN: Document Control Desk U. S. Nuclear Regulatory Commission Washington, DC 20555-0001

Dear Sirs:

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Unit 2 Docket No. STN 50-529 License No. NPF-51 Licensee Event Report 2005-002-00 Attached please find Licensee Event Report (LER) 50-529/2005-002-00 prepared and submitted pursuant to 10 CFR 50.73. This LER reports an event resulting in a Technical Specification violation when a mode change occurred with one of two required Low Pressure Safety Injection (LPSI) trains being inoperable due to a degraded mechanical pump seal.

In accordance with 10 CFR 50.4, a copy of this LER is being forwarded to the NRC Region IV Office and the Senior Resident Inspector. If you have questions regarding this submittal, please contact Daniel G. Marks, Section Leader, Regulatory Affairs, at (623) 393-6492. Arizona Public Service Company makes no commitments in this letter.

Sincerely, DMS/CKS/DJS/ca Attachment cc:

B. S. Mallet M. B. Fields G. G. Wamick NRC Region IV Administrator NRC NRR Project Manager for PVNGS NRC Senior Resident Inspector for PVNGS (all w/attachment)

NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104 EXPIRES: 06130/2007

6-2004)

, the NRC may digits/characters for each block) not conduc or sponsor, and a person Is not required to respond to, the digiskhaactes fr eah blck)informabion collection.

3. PAGE Palo Verde Nuclear Generating Station (PVNGS) Unit 2 05000529 1 OF 6

4. TITLE TIS 3.0.4 Violation; mode change made with one of two required LPSI pumps inoperable

5. EVENT DATE

6. LER NUMBER

7. REPORT DATE

8. OTHER FACILITIES INVOLVED IFACILITY NAME DOCKET NUMBER MONTH DAY YEAR YEAR SEQUENTIAL REV MONTH DAY YEAR

__NUMBER NO.

I0 I I FACILITY NAME DOCKET NUMBER 06 10 2005 2005 -- 002 - 00 1 - 2005 05000

9. OPERATING MODE

11. THIS REPORT IS SUBMITrED PURSUANT TO THE REQUIREMENTS OF 10 CFR§: (Check all that apply) o 20.2201(b) 0 20.2203(a)(3)(i) 0 50.73(a)(2)(i)(C) 0 50.73(a)(2Xvii) 3

[ 20.2201(d) 0 20.2203(a)(3)Xii) 0 50.73(a)(2)(il)(A) 0 50.73(a)(2)(viii)(A) o 20.2203(a)(1) 0 20.2203(a)(4) 0 50.73(a)(2)(iiXB) 0 50.73(a)(2)(viii)(B) 0l 20.2203(a)(2)(i) 0 50.36(c)(1)(iXA) 0 50.73(a)(2)(iii) 0 50.73(a)(2)(ix)(A)

10. POWER LEVEL 0 20.2203(a)(2)(ii) 0 50.36(c)(1)(ii)(A) 0 50.73(a)(2)(v)(A)E 0 50.73(a)(2)(x) o 20.2203(a)(2)(iii) 0 50.36(c)(2)

E0 50.73(a)(2)(v)(A) 0 73.71(a)(4) 0 20.2203(a)(2)Civ) 0 50.46(a)(3)(ii) 0 50.73(aX2)(v)(B) 0 73.71(a)(5) 000 0 20.2203(a)(2)(v) 0 50.73(a)(2)(')(A)

D 50.73(a)(2)(v)(C) 0 OTHER o 20.2203(a)(2)(vi) 0 50.73(a)(2)(')(B)

El 50.73(a)(2)(v)(D)

Specify In Abstract below or in (If more space Is required, use additional copies of (If more space Is required, use additional copies of (if more space Is required, use additional copies of (if more space Is required, use additional copies of (If more space Is required, use additional copies of NRC Form 366A)

7.

CORRECTIVE ACTIONS

• A corrective maintenance work order (CM #2800334) was initiated for the leaking mechanical seal and the LPSI 'A' Pump was repaired on May 18, 2005. The mechanical seal was removed, disassembled, inspected, rebuilt, and reinstalled using in-house Mechanical Maintenance procedure 31 MT-9SI01.

• CRAI #2819014 has been generated to require Operations to vent the cyclone filter prior to each manual LPSI or Containment Spray (CS) (EIIS: BE) pump start.

8.

PREVIOUS SIMILAR EVENTS

There have been three previous similar licensee.events reported in the last three years.

LER 50-530/2003-003-00 reported a condition in which a technical specification violation occurred when required reactor power instrumentation was not calibrated as required by surveillance requirements. The cause of the event was human performance error by control room licensed operators who did no' recognize the change in acceptance criteria when power was reduced below 80 percent.

LER 50-528/2004-002-00 reported a condition in which power was raised above 20 percent rated thermal power without meeting the Limiting Condition for Operation (LCO) for Axial Shape Index (ASI). The cause was determined to be that control room operators had incorrectly interpreted a provisional note in procedures.

LER 50-528/2005-002-00 reported an event resulting in a technical specification violation when a mode change occurred with a safety injection valve not in its required position.

Preliminary investigation results indicated the cause of the event to be cognitive personnel error.

The previously implemented corrective actions from these three previous events would not have prevented this occurrence from happening.